Control for power driven mechanisms



jig.

R. E. LAMBERTON CONTROL FOR POWER DHIVEN MECHANISMS Filed Feb. 21, 1941 5 Sheets-Sheet '1 any v NOV. 16, 1943. R E, LAMBERTN 2,334,207

CONTROL FOR POWER DRIVEN MECHANISMS i Filed Feb. 21, 19'41 5 sheets-sheet 2 Nov. 16, 1943.v R, E LMBERTQN 2,334,207

CONTROL FOR POWER DRIVEN MECHANISMS Filed Feb. 21, 1941 5 Sheets-Sheet 4 any Nov. 16, 1943. R, E L ).xMBERTQNy 2,334,207

CONTROL FOR POWER DRIVEN MECHANISMS Filed Feb. 2l, 1941 5 Sheets-Sheet 5 apparatus and-the doing of work by the hoist.

yair for the operation of pneumatic'tools com i monly necessary, anda hoist isv also often needed.

supplied Vlcy the compressor. advantageous possibilities of utilizing air driven tools and the hoist at the lsame time than are `a complicated system of Iselective clutches-and compressor alined with and i driven i directly by Vthe compressor drive shaft `-a`Ir1ost practicable hoist is driven. is provided. An'dif, as in my invention, coordinated control be*providedso-lthaft`5`0 -by its discharge pressure responsive 'control mechanism when hoist driveistofbefinitiated; it i canne positively unloadedwhen therloadon'the .,.h :zisti.s-imposedA on the driving..rno'tonr a Ymoet o5 v Patented Nov. 16, `1943 N UNITED to' Sullivan Machinery C 4of Massachusetts PAT @$34,207` y y l K ISMS gan City, `inch, assigner ompany, .a corporation Application February 21, 1941,;sena1-N0. 379,943 25 claims. (citan-isi) My invention relatesto `VVprimeimover driven -iapparatus' of the type in which a plurality of power operated mechanisms ,areV selectively -caused to perform theirworking functionsoby power from the prime mover. More. particulan 5 ly, it relates to combined pumpingand hoisting mechanisms 'driven by a common sourceoipewer and having improved means `for selectively controlling the pumping of fluid icy` the pllmiing o In construction 'work a source 'of compressed To provide separate hoist and compressor uni-ts, each with its own prime' mover," is relatively exe` 1i pensive. To provide a complete compressor `unit and an 4air operated'hoist is somewhat .less ex.-

pensive, but the size of such a hoist mightikie somewhat limited if itwere tobecperatedybyfair There might belless 20 provided with my invention, and the overall efiiciency would loe-reduced as compared with a sys- `tern in which[directv drive? of fthe hoist from 2,525

prime mover is employed; f,-however;..as my invention makes possible,l a` single prime Vuniver -be utilized for the direct drive of the hoist Aandffor the direct drive of ka compressor, andfprovision p be made to make available :substantially the full 30 power of the prime mover at the hoistandstored 'air `can oe utilized, as in 4the preferredformfof lmy invention, for tool operation while hoisting is being done, -a very satisfactory system'canhe had; and if coordinated control 'of the-con'llvresscr*35` and hoist be, asin'my invention, arrangedsoi that special arranlgementsofrengine relative `to` the hoist and compressor be avoided,-very desirable equipment is provided. Therlocation' of'la radiaii 40 l tor at one end of the unitwith anfiinternaltcombustion engine. adjacent the radiator -andovith a the enginewa. very. common 1 and practicar form of apparatus-makes drive of the` hoist tnroughd arrangementii, as according to`r my invention, means forunloading the compressor .Whenwthe regardless ci `whether the compressorbe loaded w satisfactory; `hoist kand fcompressor broken away, showing. `ci theinvention. .Y

alrunit Willi be obtained. It wiilbe understood that otherpower A.operated devices than a"` hoistcfeaniloe Lproviaed, and that the compressor isfmereiy'illustrative fof .the broadvclass .of pumping id'evices, and that liquid pumpsonvacuumpumpses .Weill as a* coinyL pressor'vcomepwithin tluerbroad yscope of myaan vention. Que inicject of `my invention.` istto; providewan improved@empanatus4 in which La; pumping device and .a1 separate power. driven mechanism may: -be

i mounted,-` i'or example, 'on a common? .base-struc ture `andlhe provided with improved yrmans for controliing' the operationzotf the mechanismaselectively .hya single power4 unit. .'Anotherfobject vof -my invention is toprovide finca combined i pumping. `apparatus .and hoistingn mechanism an imprbved means for effecting unloadingof the pumping apparatus" duringoperation othehoist.

.Still anotherohject "is .to providey an' iin-proved piece of apparatus'incliudinga compressor con- -nected for continuous drivey by a prime mover, la

hoist. optionally 'driven throughfthe` drive shaft -oithe corripressor,.fnieans forfccntrolli'ng theecon- -necticndi' the `hoist for drive,v `and -meansffor `irrterrupting. thepumpingrof fluidby the when theneistisccnnecteoupror drive. eine;

` ther-object is` to Aprovide improved control means -ior separatefpcwer fclriven mechanism whereby theload of onetoi,` the 'mechani'emsI is reduced simultaneously with the connection of another for drive byapower' unitrwhich Asupplies power vfor the operation. of fhothmecnanisms. "Still another object istol provide a compressor connected continuously in driving relation with a power'unit,

a hoist, and improved means for `selectively `con-- 'trolling the connect-ion 'of theL hoist in driving* relation-Swim an- `enginef and a ldadingor one ccm:

pressor so that on "connection "of theho'st'n drvins relation with, the engine the .compressorwiu bey unloaded., Other objects and advantages will appear inthe course` otthe. following description.

` .In the.accompanying..drawingslin whichior purposes of. illustration. one. forrn andtwofmodications which'4 .invention "may assuma4 in `4practice have vbeen shown,`

,Figa 1 is a sidetelevational View. :with :parts Fig.. 2visaplanf view, with partei broken away,

Fig. 3`is arrenlarged View with `parts ,in-.ve'rtiical ai nreierred embodiment l ationgtaleri-.ottthel line Fig. 7 is a view similar to Fig. 6, showing the valve in a different position.

Fig. 8 is a detail sectional View through a manually operable valve for controlling the venting ofthe compressor discharge line.

Fig. 9 is an enlarged side elevational view, vvsim-V ilar to that of Fig. 4; showing va modiedl form of the invention.

Fig. 10 is a side elevational view of a portion of l 5, a cylinder member 26 having a bore 21 within which a piston 28 is reciprocated, through a connection not shown, by the crankshaft I1. Formed in the cylinder member coaxial with the bore 21 is a larger bore 29 which-receives a valve mechanism generally designated 30 and a cylinder head 3|. The cylinder head is attached to the cylinthe junction of the bores 21 and 29.

der asby bolts 33 and clamps the'val've mechanism rmly in position vagainsta shoulder 34 at Connected to the side of the cylinder member as by bolts 35 is a conduit 36 at whose outer end an air filter 38 is arranged and whose other end communicates the apparatus showing another modification ofthe invention.

. Fig. 11 isa fragmentary view in plan of aportionof the compressor and the control system thereof` as utilized in the modied form of the invention shownin Fig.' 10.

In theV preferred embodiment of the invention shown in Figs. 1to 8 inclusive, an engine I, herein shown as of the gasoline type, though it will be Vobvious thatv it may assume many other'forms, pumping apparatus in the form of a compressor 2,` and Ya further power operated devicek herein in the form of a hoist 3, a're mounted on a common base structure generally designated 4 of any suitable ytype and` shown herein asv comprising spaced r,parallelskids 5 adapted for support on andslid- :ing over the ground and connected by cross members. 6. Mounted n theA base between the compressor and the hoist are control means, generally `designated 1, for controlling the connection of thehoist indriving relation withy the engine, and

lassociated* with this control means is a manuallyy Y.operatedclever 8 for operating vthe control means 1 whose movements also control the pumping operation of the compressor, as will shortly be described.' VSurrounding the engine and the compressor is a casing 9, and/mounted on the base i ystructure adjacent the engine is, a radiator -ID containing cooling uid for the engine.

As above noted,the engine is shown as 4of-the internal combustion type, and is arranged with j its power shaft extending longitudinally of the base structure, andthe engine is provided with `a throttle ,device II which is controlled by man- -uallyoperated and automatically operated means, generally designated I2, that Vwill shortlybe described more in detail.

The compressor 2 shcwnjherein is ofthe multi-cylinder, single stage type vhaving cylinders I4 and I extending radially froma crankcase I 6,

and the compressor crankshaft, a portion of which -is shown at I1, is arranged in alinement with the power shaft of the engine and shown as driven `directly thereby. "It will of course be `evident lthat it may be connected through a clutch 'or in any other suitable' member tothe engine shaft. The shaft 'I1 is2 connected, asl shown in Fig. 3, through a couplingl 8 to a shaft I9 which is shown journaled in ball bearings 2i) supported by a frame 2l mounted on the base structure 4. A fan 22 `ismounted on a bracket 23'connected to the compressor crankcase, and is driven by abelt 24 en-. gaging a pulley on the compressorcrankshaft forv circulatingcooling air through the casingcg `about the compressorv andthe engine. ,The compressor cylinders are identical in, construction, and each comprises, as. shown in`v Fig,I

the plate" 66 to guide the moving parts.

with an inlet passage 33 in the cylinder member. The passage 39 communicates with another inlet Vpassage 4I formed in the cylinder head, and the latter passage opens under the control of an inlet valve 43 into the cylinder bore. A discharge valve 44 controls the flow of compressed air from the cylinder to a passage 45 leading to a discharge conduit 41. The discharge conduits from the cylinders I4 and I5 are connected to a common con.` duit 49 which delivers the compressed air to a storage tank or receiver 50 supported above the base structure by support members 5I and 52.

Unloading means of the inlet valve opening type is provided for each of the compressor cylinders. These unloading means .are each gen-A erallyldesignated 54, and each includes members 56 and 51 and a plate attached to the top of the cylinder head of its respective cylinder by bolts 59. Formed between the members A5t and 51 isa chamber 6I. and a flexible diaphragm 63 clamped between the members 55 and 51 is movable within the chamber. kA- plunger 65 projects through -an opening in the r plate- 5,8 into the chamber 6I, and arrangedfor movement by the plunger is a plate 66 which is received in a recess 61 formed in the cylinder head 1 beneath the plate 58. Attached to the plate B6 are-rods or lingers 69 which extend through kopenings 10 in the cylinder head into the intake passage 4I andare engageable at their flower --ends with the inlet valve 43 to move the latter 1 vfrom its seat and unload the compressor cylinder .when the plate 66 is moved'downwardly in the yrecess 61. A spring 12 shown herein as a bowed vplate type spring acts between the bottom of the recess 61 and the plate S6 to holdthe platev normally in its upperv position with the plunger `(i5 held against the diaphragm I63. A guide pin 13 xedpto the cylinder head3l extends through an opening inthe spring 12 into a recess15 in Surrounding the plunger just above the plate 58 is v a packing 11 vsealingly engaging the plunger to prevent the passage of pressure ,fluid from the chamber `6l to the recess 61. A Vspring 18 rests upon the packing ring 11Aand actsl against the .lower vsurface of the diaphragm 53 y and holds the latter normally in its raised position.

It will be observed'that' the plunger 65 may I Nbe moved to its lower position to effect opening ofthe inlet valve and unloading'of the compressor cylinder by admitting pressurev iiuid'y to the chamber `tl beneath the diaphragm so that it actsv directly on top of the plunger, or-by admitting pressure iiuid to the space above the diaphragm so that `the diaphragm' itself ywill lbe .pressed downwardly and move thel plunger '65 ahead of-it. To effect automatic. unloading of the compressor and reloading thereof in accordance with compressor discharge pressure variations, there are provided conduits 80 opening l into kthe chambers 6I beneath the diaphragms gine While vrunningat la' very slow speed,' or that the hoist and the compressor loaded may be driven by the engine' running at a high speed.

`It is therefore desirablethat the compressor be unloaded and held unloaded.y whenever ythe lever 8 is in a position connecting the hoist in driving relation with the engine, and that the engine operate at a= speed suiiicient to carry'the load of the hoist. To assure such operation there are provided means, 'generally designated |09, `for venting the discharge conduit 41. immediately the hoist mechanismis connected to the engine.

9 to the' discharge conduit 41,' and connected A septhroughv an opening ||3 to atmosphere. tum ||4 divides the interior of the casing and is provided with an opening I I5 controlled by a valve ||6. A valve stem I1 projects from the valve through a plug I |8secured to the casing, as shown in Fig. 8, and is attached to' a cylinder member ||9. A rod |20 is attached at one of itsY ends to an arm |2I carried by the Valve 95 as shownin Fig. 4, and at its other end is a piston |22 reciprocably contained within the cylinder member ||9. A cap '|23 is threaded on the cylinder member,

'and springs |24 and |25 positioned within the cylinder member 'act on opposite sidesY of the piston and against the cylinder lmember and the cap` |23, respectively, for holding the piston normally in a central position between the ends of thev cylinder member. It will be seen that lwhen the lever 8 is moved toconnectthe hoist, the valve ||6 will be moved to uncover thev opening ||5 by reason of its connection to the valve 95 through the mechanism described above, and pressure fluid is ventedv from the compressor discharge conduit 41 through the conduit I|2, casing III, opening |I5 and the opening` I I3 to atmosphere, but the pressure inthe receiver is retainedfsince the check valve ||0` prevents the escape of fluid from the receiver to the discharge conduit. With reduced pressure in the discharge conduit the pilot valve will be in its venting position, the carburetor control means 2 will be in a position toy open the carburetor and speed up the engine, and any pressure fluid beneath the diaphragm of the compressor unloading means will be vented so that oil-pumped to the `.Y .top of the diaphragm will move the latter down vand effect unloading of the-compressor. When the lever 8 is moved to disconnect the hoist, the valve I I6 is closed, pressure is built uprin the discharge conduit, and. the mechanism operates automatically to load and unload the compressor with speeding up and slowing down of the engine as previously described.

to the shaft I9 and has attached thereto, as by bolts |21, an annularY shaped member |28. Attached to themember |28, as by screws |29, is a ring-shaped vmember |30'adapted to be clamped between a plate |3| on a hoist driving shaft |32 and a cooperating plate later described.- 'The hoist driving shaft |32 is` in alinement with the ,334,2'? shaft I9 and has an end |33 of reduceddiam-l` eter that is journaledin a vball bearing |34 i'ized'` in the open center of the annular member |28.

The opposite end of the shaft |32'has keyed there` toa chain sprocket |35, and the portion of the shaft 'adjacent the chain sprocket is jour-y naled in a bearing |36 supported within the end wall of a casing |31` Which encloses the parts' of thecontrol means, 1 and'is mounted on the base structure 4. Formedwon a hub'on themeniy ber I 3| are teeth |38, and an annular shaped member |39 is provided with teetharound its inl ner periphery whichinterlock with the teeth |38 otally mounted thereon a plurality of membersv |42 (of which but one is shown), each of which l is provided with any arm portion |43 for engaging a rear abutment surface on the member |39 and a rearwardlyextending arm portion |44 thatv is connected by a link |45 to a member |46 slidably mounted on the shaft |32. Formed on the member |46 is a flange portion |41, and engaging this flange portion is a shipper ring |48 that is operatively connected to a shipper arm f |49 clamped on a shaft |50 extending transversely of the shaft |32. The shaft 50`is pivotally supe ported by the walls of the casing |31 and has attached to one of its ends the manually operated lever 8. It will be seen that on throwing that the lever 8 in a counterclockwise direction, as viewed in Fig. 4, the member |43 will be actuated through the shipper arm |49 and the shipper ring'I48 to the left, causing the links |45 to swing the members |42 about their pivots and move the member |39-in'a direction to clamp the ring |30 between it and the plate I3 thereby connecting thefshaft |32l in driving relation with the shaft I9. throwing the lever 8 in an opposite direction, the

members |42 are moved away from-the member |39 andthe springs |40 force the members -|3| and |39 apart releasing the clutch and disconnecting the shaft |32 from driving relation with the shaft I9.

The hoist 3 shown herein is mounted onther rear of the base structure'll' with its drum |52 varranged to rotate on an axis extending transversely of the base structure. 1A chain`|53` engages the chain sprocket |35 on the'shaft |32 and drives a chain sprocket, not shown, on a shaft |54 which/is connected through suitable gearing, not shown, for driving the drum |52.

Suitable means are provided for controlling the operatic-n of the drum andare shown here-'as including operating levers |56, |51 and |581 `The 'lever |59 is connected through a link |60 to a shaft |9| which effects operation of a clutch, not hown, controlling the drive of the drum. The

llever |51 is connected through a link |62 to a 'shaft |63 on which a kdog |64 is Xed and is movable by the shaft |62 into engagement with teeth |36 on the drum for locking the latter.

against rotation in an unwinding direction; The vlever |58 is connected through a linkv |68 to y a shaft and controls the operation 'of a brake, Anot shown, for breaking the rotation yof the drum. It will be noted that, since control of from .the inlet valves and Vpermit normal *operation. of the latter."` The engine then ydrives thet u fmediatjely through `conduitiliti',`

I the clutch ring `ii'arld ajoonnectingvof the shaftl I y Q "eigenem thenhoist isieffec'ted'- byV the'lei/ers las't-y described after the control lever 8 has'been operated to connect shaft |32 to shaft I9,` theothercontrol ,mechanisrnwillj have had timeto become opern i The modeofoperationof "the mechanism `de` scribed may be `briefly"summarized' as follows.

"Assuming that it is desiredifto eompress'air `for. 1

delivery to the reeeiver, the lever 8 will be swung fio Ainto the position shown` in Eig; arto `disconnectl 'the hoist` drive shaft 132V from driving relation' with `the engine, toA effect aclosure off'the valve H6w cutting `oii the venting `of the "compressor a.'

discharge conduit, and to" move the valve '15 into the position;` shown infFig.-6 softhat any liquid'in the chambers 6l Yabove'the diaphragrns 63 ofthe'V compressor .unloading` means maybe ventedto the crankcase of the compressor. Then,v

spring 18 of the' unloadingvrieans 4`forces lth'e Qg'o diaphragm G3 to its upper'positiomfandvif the fspace in `the chamber jjf berieath'lthe diaphragm is vented to atmospherer'as will bei'th'e casefif the'` pressure inthe receiveris low enough-'soV that the pilot valve 34 assumes its rventing` position, `the v plunger. 65 will be'm'ovedi to itsA lupper position 4tytsoSpring"125mlift-the 'lingers `es 1 varied by adjustznent^ ofv thefthrdttle bythe Infanually'ioperated leverfi Q81 Ifthepressure inthe receiver builds up` to emaxirnum 4value/"for which' the pilot. valve 84 lisA adjusted, the latter operates and airl ,under "pressure" 'flows im- 35 to.. operate; the pressure responsivel means ofthe jthrottleconfr v4trc'zlmeans l2 and effe'ctfa slowing down ofjthe 'engine'. Pressure" fluid also ,iiowsgimme'diately A past the delay valve '83 tothebliamber'spaces "Y10 beneath the diaphragmslwherelit QTSfOllfllie tops ofthe plungersA E 5 and' moves them tof positions unloading the compressor, Ii the pressure inthe receiver again dropsvto 'thelow'er c'p'erat-Y ing pressure of the pilot valve,8'4,`pressure"uid 45 is `vented freely from '-the Vpressure responsive' p means ofthe carburetor control means l2 'causf ing the. engine to speedup, and is vented slowly from the.space.V inithechamber 6'! beneath .they diaphragm Saso that the compressor is'reloaded 50 after the motorhas speeded up.; Iiwit is desired to use the hoist- 3, the lever 8 is. swung4 in aV counterclockwisedirectionffrom the position. shovlnjn Eig... 4;. This causes the redflA to move the valvev 95'into'ftlieposition 55 shown in Fig. Tforsupplying oiliinder pressure to the` upper side oi-theoiaphr-agm 39,fand-tef-Y `.fectsan openingl'oflthevalve fflfffo'r venting pressure. uid. from thetfdischarge. cond tg'I.

With the. dischargeconduitvented the v'pilotv 60 valve moves,A toa positionzjventing the. throttle control'. means. I2V and the."space`s beneaththe diaphragms.. The engine-speedsupand the iorcesthe latter. `to` their lower positions, ,moving. withY them theplungers for unloading the i cornrnzessor.V The, swinging of the l'everv `in a contercloclwiseldirectionfalso causes a rotatioi'iof the shaft ii'iilfvvhich Vmolvesi'lhe shippery arm i'ii in a direction'to effect a`clampin`g of v70 illl in driven relation with the' engined. As the shaft., i322 .is causedto rotateffthe chain sprocket ILSE on" the end of' the shaft-"1.32 ,drives the chain i5? which in turn drives the shaft "T54 75 l s and Athe noisngdfum lrsi mythen be turned "through4 suitable gearing'and a clutch', not shown, In` the `Inodi`flcation of the invention shown in' Fig. 9 means areprovidediforlblowing `down thereceiverwhen the lever 8 is moved to a posi-4 l -tion forconnecting the hoisty indriving relation 1 with the *engine*` With the receiver blown down the f pressure in the `"compressor l discharge line will of "course bel approximately atmospheric, wand-thepilotvalve1 will move to its venting positi-onj tov vent pressure fluid from the carburetor control means and rfrom thespaces beneaththefdiaphragins of thecompressorunloading4 means.` l Onfsupplyingfluid under pressure to the"spaces` ``above the diaphragms thev compressor will be.

l' unloaded; and; since .this supplywill be continued as long as the'V lever 'B is' in"itsdhoist-.connectiiig position,` the'lhoistand the Vcrmipressor unloaded `will`be driven by thee engine` at alligh speedll The structurefin'this modification is -the `same as that ofthe 'preferred lfor'm `exceptthat 'the venting means for the kompressordischarge line, 'vas'shown in the `preferred'formji's eliminated, andmeans for blowingdown the receiver is `pro-` irvided; Uue'to thesimilarity of lc'onstruction only a portion' of the `apparatusrneed be shown, and 1ike` parts will be numbered thesame as inrthe preferred form.V Inithi's construction the receiver 50 isconnectedgby a" conduit'llZ -toja` valve device '11.3,' and a jonduit IMbon'neets the valve device Y'On moving the lever 8 in a counterclockw'ise di` Flection' the valve' 95 is moved through the rod 99 andthe'arni 9'8 to a positionc'onneoting the cori- `duits?lITVand 92 so that oilis supplied under pres'- surefrom the ompressor crankcase for effecting an" unloading of the compressor as in the preferred form of the invention. When the l'ever"8 ismved in a clockwise direction to disconnect the hoist,` Athefvalve device W3' closes cutting 61T th'e`escape' of fluid -from lthe receiver, and the valve 95 is moved to a position connectingiconduits'- illand 93 for venting o presser iflnloading'means.` n Thelmodiication of'the invention shown in `Figs; lOandllfis'like that of thepreferredform except that' no means are "provided `for venting lthe compressor discharge conduit 4T whenthe il; from the' comlioist isA connected in driving relation 'withithe` "'enginej.V `As1 long as the pressure 'inthe receiver `"iilfi's'below the maximum operating pressure of j e pilot valve 8e the compressor unloading `meansbel`ow the diaphragms'will be ventedfto atmosphere, and as soon as the lever 8 is moved :tlo' its positionl for connecting'the hoist in driving relation'with the engihe,'oi1 supplied through the 'l concluitsftz .and 81 to the unloading means above lthe' diapliragms'will cause the compressor to be ju nloaided. When the lever 8 is moved toa'posil tronto' disconnect thehoist-vthe oilA willbe vented ,'frornjthe unloading means throughfconduits 81 and `tojthe compressor crankcase; and theco'rn- 4pression reloads andy pumps iluid to the receiver uriiili'tli'e pressure reaches that at which the pilot valve'opensYto--supr'ily pressure fluid through the delay valve iiandthe conduits 82,-80-to the. un-

loading means. and through conduit |65: to the carburetor control means'for slowing down the engine. While this form'. lacks something of the n icety and certainty o f'fcontrol of the first form, it is eiective within ordinary operating needs.

- As a result of this nventionit will Abenoted thatv there is provided an improved meansfor seletively connecting the load of separate power driven mechanisms in driving relation with a sin- .gle power unit. 1 It will further be noted that thereis provided a compressor connected con- -tinuously in driving relation with a power unit, a Vseparate -powerdriven mechanism connectible inv driving relationwith thepowerunit, and improved means forunloadingthe compressor while j the power drivenmechanismiis being driven by the powerunit. It will also be noted that there lis' yprovided a compressor havingk improved automatioally controlled andmanua'lly controlled un-v loading means; a hoist, `and means for controlling the connection of thefhoistv in drivingrelation with the compressor crankshaft and simultaneous1yeffeting an operation ofthe manually con- Other `.advantages of the inventionwill be y.clearly apparent to those trolled unloading means.

skilled in the art. l y

'The improved unloading means per se disclosed in this application rvis' being claimed in .my coin variousother formswithout departingy from4 its spirit or the scope of the appendedclairns. What I claim as. new and desireto secureby .Letters Patentis: v

1. In combination, a power unit,a ycompressor connected for drive by said power unit,funload ing means for said compressor, a. power driven mechanism adapted to be driven by said power unit, means for 4controlling the connection of said `power driven mechanism in driven relation with said power unit, and means operativelyr connectedto saidlast mentionedmeans and operative simultaneouslytherewith for controlling said unloading means.

- 2; In combination, a power unit, a compressor connected for drive bysaid power unit.- unloading means for said compressor, a power driven mechanism vadapted to be driven by said power unit, means for connectingsaid power'driven 4mechanism in driven relation with said power unit, and means -operatively connected to said to 'said unloading f means lwhen said. power driven mechanism iscOnneCtedin driven-relation withy "said power unit.

4 In combination,v a power unit; `a compressor Aconnected for drive by said power unit, `.fuidf'vv actuated unloading means vfor 'unloading said .compressor onr thesupply of fluid theretofa' power driveny mechanism adapted .to be driven by saidpower unit, a clutch for controlling-the connection ofsaid power driven mechanism in driven V-relationwith said power unit, a valve for v controlling the supply of `actuating uid to said'unloading means, means for `controlling at will the .operation of saidfclutch,y and means actuated automatically upon the movementof said clutch for effecting an operation of saidvalve -5.- In combination, a power unit, a compressor connected for drive by said power. unit, uid actuated unloading ,means for unloading said compressor on the .supply of Vfluid thereto, a power Y driven mechanismadapted to be driven by said" powerunit, a clutch'for. controlling the con--v nection'of said power driven mechanism in driven relation with said power unit, a'valve lfor controlling the supply offactuatingfuid to said unloading means, means yfor controlling at will the operation of said clutch; and' means actuated uautomatically upon the movement ofv said clutch 'for effecting an operation of saidvalve, said manually operated meansA ,and said last mentioned fmeansbeing'arranged for eifecting'simultanef ouslyv an operation ofsaid clutch forconnecting said power drivenmecha'nismin ldriven. relation with said powerunit'and the opening of said valve. to supply.' fluid to said unloading means.

6. In.' combination; a power unit, a'compressor havingits crankshaft connected for drive bys'aid power unit', unloading means for said compressor,

.a `'hoist adapted to be driven by said powerfunit, 40.

fsaid hoist in driven relation'with said power unit,

and means operativelyconnected to said clutch clutch meansffor controlling the connection'of means' and'operative simultaneously therewith `last mentioned means and operativel simultanef' .ously therewith for effecting an unloadingoperationl of said unloading means when said power ydriven mechanism is connected in driven rela-r tion vwith said" power unit.

3: In combination, a power unit, a compres-l sor connected vfordrive by said power unit, fluid :actuated unloading means for unloading said compressor on the supply of uid thereto,v a power driven mechanism adapted to be driven by said power unit,. means -for connecting said power driven mechanism in driven relation-with said .power unit, and means operativelyconnected to` v said last mentioned means and operative simultaneously therewith for supplyingactuating uid nism is connected for controlling said unloading means.

{"lQfIn combination, .a power unit, a compresA sor having its 'crankshaft connected for drive by said Y'power unit, hydraulic unloading means vfor said compressor, a hoist adapted to be driven by said power. unit, clutch means for connecting .said hoist"V in driven relation with said power unit, valve means for controlling the supply of liquid under pressure to said unloading means' manually operated means for controlling the operation ofv said clutch, and means operatively 4 .connected `to said clutch and operating simultaneously therewith for controlling said valve means.

*8. `ln combin'ation, aipower unit, a compressorhaving its crankshaft connected for drive by said power unit,y fluidactuated unloading means for said compressor, means operative at a predetermined compressor discharge pressure for supplying operating iluid to said unloading means, a power driven mechanism adapted to be driven b y said power punit, manually operated means for.r

controlling the connection of said powerdriven mechanism in driven relation with said power unit, and means operatively connected to said Ylast mentionedmeans and operative simultaneously therewith for supplying fluid to said unloadin'gmeans when said power. driven mecha.-` in driven relation with'said f power unit.

9,'In combination, a power-unit, a compressor having its crankshaft connected for drive andoperativeftherewith simult said discharge conduit andabysaid power unit, hydraulic andpneumaticiunloading means forsaidl compressor, meansoperative at` a predetermined? c'omizvressor` discharge pressure for supplyinggaseous uidto. said- 'unloadingr'neans, a power driver-ifmechanisnr adaptedi tobe driven. by sai'd power unit, manually operated means` for' controlling the ccrmection of saidv powerk driven mechanism in driven relation with said: power unit,'and means'operati'velyv connected to: said@ lastl mentioned meansand operative simultaneously therewith4 for controlling the supply of liquidptc said, unloading means.`

IO'Ll'n combination, a power unit, a compressor having 4its crank-hsait connected for drive by said. poweriunit, a receiver for; receiving flu-id discharged' from.n said compressor', unloading means for said compressor, venting meansffor saidreceiver,v a power drivenl mechanisml adapted to'bel driven by! sai'dhpowerunit, means, for controlling the connectioni 01...said power .driven mecirlaznismY `in-r drivenv relation with saidV power uni.t,fandmeanscperatively connected to. saidlast mentioned: means'. and .operative simultaneously therewitirfor controlling saidf unloading means and 'said ven-ting means..y i

1:1. llncombinatiunyair internal combustioneneine', as compressorfconnected'for driveE byv said engine. means fort.' controlling 'the` speed of'said engine. including a; pressure fluid,` controlled throttle .val-ve,4 .luid'actuatedi unloading means for: saidzcoinpressonlmeansuincluding a valve? responsive toi a: predetermined compressor discharge pressure.. for supplying: pressure fluid toi efectciosnref'onsaid throttlev valve and-fior supplying pressure'iiuidctosaid unloadinglmeans,

a hoist adapterirto be: connected' ina driving. relationwwithgsaild: engine; a`.manualiv operated clutch for. connecting. said .zhoist in :driven relation'. with -said engine;,-and Imer/msioper tively connected.. to

said :clutch and", operating si'i'nultaneouslv `theref withf tor supplying.` fluid lunder pressure 'to said unloading means-f Y l l2.` 2Enl combination, a. Vpower unit, compressori connected for' drive byl said, power unit a receiver orreceivingiluid; discharggcdj fromA said compressor through a dischargefconduit,a;check valvev in said` discharge conduit permitting. fluid ovv.V toward .said receiver` and.; preventing fluid flow in; the opposite-f irection;uid `actuated unioadingmeansi fon said compressor, means. re-ji spon'sive'` tofY the pressure: said* discharge; conduit. iior c'ontrollinglp the flow ori-.pressure `fluid to saldi unloading means; a power driven. mechanism adaptedtobe driven by said powa manually Operated means tor controlling th relation-with; said power-units.andincansopf era-tively connected tosaidlast mentioned means said unloading means. v i

13. In- -combination apoiver unit,` a compres- .sor `connectedfor` drive-@by said- ;povler uniu a receiver for. receivi-n'gfluid discharged from said compressor vthrough af, discharge cond-uit, at check `.valve inv said4 discharge conduit permitting fluid flow toward lsaidtreceiver `and preventing duid y `flow in the opposite direction, fluid actuated. un- Iloading means for saidl compressor, means relsponsivetof the pressure' in said discharge. conduit between said'compressorl and. said check valve for controlling the now of vpressure Vduid to said unloading means, manuallyfcontrolled valve'l means for venting. said discharge conduit between said compressor and said check valve,

unit,V

y ori-z nection-.- of said power` driven` driven f a power 'driven mechanism:V adapted.y to: bei driven by'fsaid-pcwer unit, manually operated vmeans f for. controlling the connection of. said power fd-ri'v-eni mechanism.in driven relation with. said power valve-meansfor controlling a supply of. fluir-l. under pressure, to saidunloading means,

andameans operatively-connected: to saidmanually operated means and operative simultaneously therewith for actuating said: manually controlled valve means and said lastmzentioned valve means.

14.In combination, an engineja compressor driven by. saidl enginev and having unloading means; controlled' by,` compressor discharge. pressure, a receiver,y adischa-rge connection. between thel compressor and the receiver, a hoist, `clutch means; .between Lth'e. compressor `and hoist, .con-` trolling means for said clutch means, and means actuated..uponmovement of said clutch controlline'V means. to connectl said hoist forv drive `toapplyran auxiliary unloading force to'said unloading `means..

4means from itswnormalr compressor discharge pressure control while said hoist is connectedto .saidf'compresson i 116. In combination;

sure, a receivena discharge connection between the ,compressor and the receiver, a hoist, clutch meansV between theo-compressor and hoist, controlling. means for said clutch means, means actuatedv bymovem'ent of said clutch controlling meansto connect said hoist fcrdrive to apply an. auxiliaryunloading force to said unloading means: and means, including receiver venting means for relieving said unloadingrmeans from its'gnormal compressor` discharge pressure cori- Vtrol while saidy hoist-is connected to said compressor. l

1'?. In combination, an engine,` alcompressor driven `by saidnengine andA having unloading means controlled-by compressor dischargepressure, a-receiver, a. discharge connectionbetween the compressor andthe receiver, valve meansin .y said discharge connection for preventing theflow cusiy ven-tng uidto.

of nuid fromA said receivertoward said compressor, a. hoist,V clutchmeans between the compressor andhoist, controlling. means for said clutch means actuated by movement of said clutch controlling` means to connect said hoist fo;` drive toapply an auxiliary.v unloading forceV to` said unloading means, and means for relievingsaid unloading vmeansffrom its normal compressor p discharge pressurecontrol whilev said hoistis connectedto saidcompressor, said relieving Vmeans vilficluding. discharge .connection Venting means between said valve means and said compressor.

18. In combination, a power unit, apump driven by said powerunit, means `operative upon 'the "supply of operating medium thereto. ior effecting ajslowing down. of said power unit,me'ans operative when pump dischargepressure attains to a predetermined value for efiectinga supply ofv operating 'medium to said means for eectingl-a an; engine, a `compressor driven by said engine and having .unloading means controlled by compressor` discharge presexists at the time of lsuch connection.'

adapted to constitute a furtherloadfor'said power unit, means for cormecting'said apparatus to said. power unit for drive by the latter, operating means for said connection yeffecting means, and means rendered operative Whenever said 'operating means is causedv to effect connection 'of said apparatus with said power unit for ef- Vfecting discontinuation of the subjection of said means for effecting a slowing down of the power unit to operating medium if such a subjection 19. VIn combination, a power unit, a pumpfdriven by said power unit and having unloading '-means operable'lupon thesupply of operating "down of the-power unit, pump discharge pressure responsive means operative when pump discharge pressure reaches a predetermined vvalue for eiecting the supply'of operating medium to eect unloading of the pump by said unloading means and the slowing down of the power unit by said power unit speed controlling mechanism, apparatus adapted to constitute a further load for said power unit, means for eectingconnection Vpf said apparatus for drive by said power unit,

operating means for vsaid rconnection-eiecting means, and Imeans operated whenever said connection-ele'cting means connects said apparatus for drive by the' power unit for freeing said Vconutrolling device from theaction of operating` medium if operating medium is being supplied thereto when said apparatus is connected for drive by said power unit.

l 20. In combination, a power unit, a pump driv- ,en by said power unit and having iiuid'operated `nloading means, a power unit speed controlling device having a fluid operated control mechanis1n','pump discharge pressure responsive means for effecting fluid supply for effecting operation of said unloading means to unload thepump and of saidvpower unit speed controlling i device to slow down said power' unit when pump discharge pressure reaches a predetermined value, a hoist, means vfor effecting connection of saidvhoist `for drive by said power-unit, 'operating means for said connection-efiecting means, and means connected for operation lwith said connection-effecting means for interrupting the supply of fluid to said power unit speed'controllingl device under sponsive means when said hoist is connected for drive by said power unit.

2l. In combination, a power unit, a lpumping apparatus connected for drive by said power unit,

' pump'discharge pressure responsive means operativeupon the vattainment of a predetermined pump dischargev pressure for unloading said pumping apparatus and slowing down said power unit, a separate' mechanism adapted to be driven by said power unit, means for eiecting a connection of vsaid separate mechanism indriven relation with said power unit, and means made eifective whenever said mechanismis connected in driven-relation kwith said power unit for effecting unloading of said pumping apparatus if it be loaded at the time and for' rendering said means for slowing down said power unit ineifective if it be maintaining said power unit slowed down at the time.

l 22. In combination, a power unit, avpumping apparatus connected for drive by' said power unit,

.slowing down.. of [said 1power unit, apparatus pump vdischarge pressure responsive means, .means lcontrolled. by said pump discharge pressure responsive means for effecting unloading`v of saidy l pumping apparatus when pump discharge pressure attains a predetermined value, means con- -trolled by said pump discharge pressure responsive means` for slowing down said power unit when pump discharge pressure attains to said predetermined value, another mechanism adapted to be driven bysaid power unit, means for effecting` aconnection of saidr other mechanism in driven vrelation with saidpower unit, and means made effective Whenever said other mechanism is connected in driven relation with said power unit for effecting unloading of said pumping apparatus if it he loaded at the tirneand for rendering said vmeans for slowing down said power unit ineffective even though said pump discharge pressure responsive means be at the time effecting slowing down of said power unit.y

23. In combination, a'power unit, a pumping g apparatus connected for ldrive by said power unit,

a pressure responsive device for controlling the supply of operating uid to said power unit,

pressureresponsive unloading means for said pumping apparatus, means for conductingpressure luid to said pressure responsive device and to said unloading means, means operative at a. predetermined pump discharge pressure for supplying pressure fluid to said fluid conducting means, valve means movable to effect an interruption of the delivery of iiuid to said conducting 'means and the venting of `fluid from said conductingmeans, means for conducting iuid under pressure from a separate source to said unloading means, valve means for controlling the lflow, of pressure fluid through said last mentioned means, another mechanism adapted to be driven by said `power unit, manually operated means for controlling the connection of said other mechanism in driven relation with said power unit, and means connected for operation with saidmanually operated means and adapted to effect actuation of said valve means to positions for effecting an the control ofsaid pump discharge pressure rei* interruption of the flow of'iiuid to said pressure responsive device and for supplying fluid to saidA t unloading means when said manually operated means is operated to connect said other mech-l anism in driven relation with said power unit.

24; In combination, a power unit, acompressor connected for drive by said power unit, a pressure responsive device for controlling the supply of operating fluid to said power unit, pressure responsive unloading means for said compressor, means operative at a predetermined maximum compressor discharge pressure for supplying pres'- sure uid to said pressure responsive device, said pressure fiuid supplying means including avalve for controlling the ow of operating uid relative to said pressure responsive device, means including a valve for supplying uid under pressure to said unloading means, another device adapted to be driven by said power unit, a clutch mechanism for controlling the-connection of said other device to be driven indriven relation with said power unit, and means so constructed and ar-` ranged thatupon operation of said clutch mechanism to connect said other device tobe driven in driven relation with said power unit said valves are disposed in positions for venting uid from saidl pressure responsive device and for supplying fluid under pressure to said unloadingk means.

25. In combination, a power unit, a compressor connected'for drive by said power unit, a pressure responsive' device for controlling thesupply ofv operating fluid to said power unit, means operative ai; a predetermined discharge pressure'fof said power driven mechanism in driven relation with said power unit, valve means for controlling the 'supply of pressure `iuid to said pressure responsive device, andmeans including a manually operatedelement for controlling both the operation of said valve means and said connection controllingmeans.

` RALPH E. LAMBERTON.

CERTIFI GATE OF CORRECTION.

Patent No. 5514.5207., November 16, 1915.

RALPH E. IAMBERTON.

It is hereby certified that error appear-s in the printed specification of the above numbered patent Vrequiring correction as follows; Page l, second column, line 29, for "mechanism" read --mechsnsms; page 2, first column, line l2, after "detail" insert central; line 6b., forI "member" read mamner--g page J4., second column, line 58, after- "thyowng" strike out that"; page 6, first column, line 52, for the before "present" read ths; page Y, first column, line 114., claim lO, for "Crankhsaft" read -orankshaft; and second column, line 60, claim 17, for "means actuated read means, means actuated; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Office signed and sealed this 15th day of February, A. D. 191m.

Henry Van Arsdale, (Seal) Acting Commissionerof Patents. 

